Problems are the solution®

Interactive problem-based courses for use with any textbook. Mix, match, and share.

Trusted by the National Science Foundation

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10,036,720+problems solved
400,000+students
3,500+schools

Competitions

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Computational and Algorithmic Thinking

Enigma
Grades 5 - 12
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Enigma

English

Coming Soon!

Problem solving is the key to learning.

Studies show that the best way to master a subject is to solve problems. Lots of them. Our mission is to provide affordable access to exceptional problems by unlocking them from expensive textbooks and private repositories.

Educators

Improve student learning and spend less time on grading. Map to any OER textbook of choice and save students money.

Mix, match, and share pre-built courses authored by other educators.

Students

Improve your grades by solving problems in one of our online series or participating in a competition.

Join Edfinity to enroll in an educator-led course, or choose from one of our many self-serve series.

Institutions

Monetize your assessments. Use our marketplace to reach audiences, and build your white label, branded solution on the Edfinity platform.